Remove outdated projectsPrefix setup

settings.gradle

@@ -42,18 +42,12 @@ if (isEclipse) {
   projects << 'core-tests'
 }
 
-String prefix = ''
-if (hasProperty('elasticsearch.projectsPrefix')) {
-  prefix = "${getProperty('elasticsearch.projectsPrefix')}:"
-  projects = projects.collect { "${prefix}${it}" }
-}
-
 include projects.toArray(new String[0])
 
 if (isEclipse) {
-  project(":${prefix}core").projectDir = new File(rootProject.projectDir, 'core/src/main')
-  project(":${prefix}core").buildFileName = 'eclipse-build.gradle'
-  project(":${prefix}core-tests").projectDir = new File(rootProject.projectDir, 'core/src/test')
-  project(":${prefix}core-tests").buildFileName = 'eclipse-build.gradle'
+  project(":core").projectDir = new File(rootProject.projectDir, 'core/src/main')
+  project(":core").buildFileName = 'eclipse-build.gradle'
+  project(":core-tests").projectDir = new File(rootProject.projectDir, 'core/src/test')
+  project(":core-tests").buildFileName = 'eclipse-build.gradle'
 }